Configuration Locking in IIS 7

IIS 7 has implemented a new feature called "Configuration Locking". This is to make it easier for administrators to store configuration files on a network share, typical in a web server farms.

a common problem that occures with configuration locking is, you get an error similar to this:

HTTP Error 500.19 - internal server error. The requested page cannot be accessed because the related configuration data for the page is invalid.


In most cases you will need to "allow" access (unlock) the handler or module section in your IIS "applicationHost.config" file in a Notepad. Here is how:

Open the applicationHost.config file, located here: %windir%\system32\inetsrv\config\applicationHost.config

Always make a copy of this file before making any changes to it.

Change this line:

section name="handlers" overrideModeDefault="Deny"

To:

section name="handlers" overrideModeDefault="Allow"

If you continue to receive this error, repeat the same for:

section name="modules" allowDefinition="MachineToApplication" overrideModeDefault="Deny"

Steve Bashiri